Impacting tool



Aug. 31 1926.D

' y www@ L LMQQQCA IraPAcTING TOOL' Filed August 23, 19,2111

Patented Aug. 3l, 1926. l i

U hl l fli T 'Q @la l C E.

JAMES LAROCCA, OF CIMITERO, ILLINS, ASSGNORTO ELECTEOJMAGNETEC TOUL `(JOM- IPANY, OEVCICRO, ILLNOIS, .AC0213,75?CERA/1TH)NY OF v'.[LLINOIES.

IMPACTING TBOGL.

Applicationlcd August 23, 1924. Serial No. 733,750.

lily invention is a mechanical 4moveifnent upon the shaft l, `a shoulder 6 upon the finding; usetul employment in various ways, shaft limiting the extent to which pinion 5 the `nuchanisn'i ot' my invention being` of may be screwed upon .the sha\ttthis shoulder particular service when employed in the cooperating` Iwith the adjacent tace of the 5 5 operaiinf.;- mechanism of an impacting tool. pinion lto '.torce the pinion and shaft to turn The mechanism ot my invention includes vtogether upon continuation ot the 4effort to rotatable carrier, a plunger carried therescrew the A.pinion further upon the shaft as by, mechanism for effecting intermittent `vill `more ,fully appear, when opposite turnaing movements .ot the carrier and vfor inn' effort is applied Yto the pinion it Will be G0 1U sh ting` the 4plunger to alternative Eposiunscreived a shortdistance from the shoultions, and `an abutment ivith which the der o permit the pinion 5 to be arrested and plunger has escaliing` engagement when theA subsequently turned faster .than and in the carrier is turned totengage -the Eplunger and direction o't' the shaft. The pinion is thus abutment. This abutment may be the butt in lost motion connection `with .the shaft. 65 15 or striking end of a ldrill or .rivet set when T he annular carrier lThas ahub portion 7 the invention is embraced in an impacting `by which this carrier is journaled upon the tool. In the preterred yembodiment `ot the shaft l tobe capable ot turningiin the course invention an electric motor drives the carof .operation both with respect to and in the rier through the intermediationiofgearings .dirM/tion ot this shaftV and [the pinion 5 70 i 'fl which permits .the rotation of the carrier threaded upon the shaft. The plunger mechto be arrested `by the abutment, this -gear- Yanism 1is shown as being employed in dupliing; cooperating with `the abutment to effect cate, though lthe invention is not to loe thus the va'ithdravval oit the yplunger from the Apolimited. `lilach of ithe tivo plungers -Svand 9 si ion to which it is placed by a spring, the .isin the form oit a rack in mesh Withoppof spring` in iturn, serving toel'tect rapidimove- `site sides of -the'common pinion. These ment o' the carrier when the yplunger escapes racks-are movable upon and travel bodily the abutment to movetheiplunger rapidlytto .with the carrier. Springs l0, ll press upon normal position with respect to the carrier, the inner ends of theraclrs and serve, when the spring' directly eltectingthe impacts. freetoact, tov place the raclrs in ,their outer S0 30 The 4iuiention `vill `be more fully yen- .positions defined -by suitable stopping` plain/ed in connection with the accompanymeans, such as the casing. Anabutment l2 ing' drawing,Y in which Fig. l is a yside view, is positioned Within lthe circle ot rotation ot with a casing` cover removed, of `the pre the .outer ends of the racks lwhen these racks ierred-torm of mylinventionas embrace/drin are in their outer positions, whereby the 85 aniimpacting tool llig. 2 is a sectional view vsides Voat the racks successively strilfze the on line 2 2 ot" Fig. l; Fig. 3 is a sectional abutment as the carrier is given intermittent vieu' on line 3 3 ot Fig. l With-partsshown turning' movements that are rapid inthe diin tull; and Fig'. d is a view-somewhat simrectiony ofthe sha't't and pinion. The invenilar to l but showingalesser' portion, tion is illustratedas being embodied in an 90 l the carrier and plungers being shown Withimpactingv tool in `which the abutment is the drawn from the abutment, the carrier being butt orl striking end 4ot a drill 13 which also shown in section. passes through a casing ll that houses the 'lhe operating shaft Vl may be driven by carrier and other parts, to project into the any suitable means. -ln'the drawings Yiiliave interior `of the casing. rlhe drill has a 95 i5 illustrated an electricmotor 2 brought into lshoulder Vlorniation 15 to limit the extent to driving;v relation ivithfthis-shat throughtthe y,which the abutment `will enter the casing and intermediation of afspur pinion 3 uponthe define the `functioning position of the abutmotor shaft and 'a spur gear ill upon the nient The motor 2 and the gearing 3, tmay y operating;` shaitt. The operating shaft may be carriedby the casing upon its exterior. 100

5)@ 'function through any-suitable meanssuchas For convenience thecasing is lormed with an aspur pinion'which Yispr'elerablyscrewed `extension 16 constitutinga handle 'tor the device if itis to be of portable and manipulatable form.

Operation-The shaft l is driven at a substantially constant speed by the motor through the intermediation of the gearing 3, 4, and in a direction to screw the pinion thereon against the shoulder 6 to enable the shaft and pinion to turn as a unit when required. Assuming the deviceto be in the stage of operation illustrated, the pinion 5, coupled at 6 with the shaft draws the now non-rotating racks or plungers 8, 9 inwardly against the force of the springs l0, ll until the rack 9 escapes engagement with the abut# ment, whereupon the springs distend ant force the racks rapidly outward to points limited by the stopping means, in this instance the casing` 14. The racks initially travel upon and partially turn about the pinion 5 in the kdirectionfof the shaft at an increased or higher turning speed, as a consequence of the spring effected rotation of vthe carrier. lVhen the racks are brought to their outer positions they acquire locking engagement with the pinion 5, effected in any suitable way, as by engagement of the outer ends of the rack with the casing to arrest its rotation by the shaft, the speed of rotation of the pinion `being consequently increased to screw it out of engagement with shoulder 6. The pinionpcari-ier and racks are thereafter turned at the higher or increased speed as a rigid unit in the direction ofthe shaft due to the momentum acquired from the action of the springs. until the side of the rack 8 at the outer end thereofstrikes the abutment l2 with the momentive force,

a first effect being to enable the shaft l to turn the pinion o into holding engagement with the shoulder 6 whereupon the rack 8 is operated upon and operates as described in the case of rack 9. Y

Changes may be made without departing from my invention. Y

Having thus described my invention, I claimt* l. The combination with an operating' shaft; of a pinion screwed upon the shaft and free to turn thereon; a rotatable carrier free to turn with respect to both shaft and pinion; a rack bodily movable upon and traveling with the carrier and in mesh vwith said pinion; a spring forA placing the rack in an outer position; and an abutment with which a side of the rack is brought into escaping engagement when the rack'is in its outer position and cooperating with the pinion to effect inward abutment escapingY movement of the'racli against the force of the spring, said rack initially traveling upon the pinion and subsequently cooperating with the carrier to screw'the pinion in one direction upon the, shaft when the rack is spring pressed outwardly upon escaping the abutment, the turning' shaft screwing the pinion thereon reversely when the rack en- 2. The combination with an operating shaft; of a pinion; a coupling'between the pinion and shaft enabling the shaft to turn the pinion and permitting the pinion to turn at afhi'gher speed'to break the coupling; a rotatable carrier free to turn with respect to both shaft and pinion; a rack bodily movable upon and traveling with the carrier and in mesh with said pinion; a spring for placing the rack in an outer position; and an abutment with which a side of the rack is brought into escaping engagement when the rack is in its outer .position and cooperating with the pinion to effect inward abutment escaping movementof the rack against the force of the spring, the rack when the spring pressed outwardly upon escaping engage- -ment with the abut-ment cooperating with the carrier to rotate the pinion at the higher speed to permit the rack to be thrust outwardly before the abutment is again reached by the rack.

3. The combination with an operating shaft; of a pinion screwed upon the shaft and free to turn thereon; a rotatable `carrier free to turn with respect to both shaft and pinion; a rack bodily movable upon and traveling with the carrier and in mesh with said pinion; means `for placing the rack in an outer position andincreasing the speed of the carrier, and an abutment with which a side of the rack is brought into escaping engagement whenthe rack is invits outer position and cooperating with the pinion to effect inward abutment vescaping movement of the rack, said rack initially traveling upon the pinion and subsequently cooperating with the carrier to screw the pinion in one direction upon the shaft when the rack is moved outwardly upon escaping the abutment, the turning shaft screwing the pinion thereon reversely when the rack engages the abutment, there being holding formations upon the shaft and pinion that are engaged in this latter screwing movement of the pinion to enable the pinion to cooperate with the abutment to withdraw the rack from engagement with the abutment against the force of the spring.

4. The combination withv an operating shaft; of a. pinion; a couplingy between the pinion and shaft enabling the shaft to turn the pinion and permitting lthe pinion to turn at a higher speed to break the coupling; a rotatable carrierfree to turn with respect to both shaft and pinion; a rack bodily movable upon and traveling with the carlll) rier and in mesh with said pinion; means for placing the rack in an outer position and increasing the speed of the carrier; and an abutment with which a side of the rack is brought into escaping engagement when the rack is in its outer position and cooperating with the pinion to eitiect inward abutment escaping movement of the rack, the raci when moved outwardly upon escaping engagement with the abutment cooperating with the carrier to rotate the pinion at the higher speed to permit the rack to be thrust outwardly before the abutment is again reached by the racl. Y

5. The combination with a rotatable carrier; of rack bodily movable upon and traveling with the carrier; a driving pinion in mesh with the rack; means tor driving the pinion and in lost connection therewith; a spring for placing the rack in an outer position and an abutment with which a side ot the rack is brought into escaping en- .gei'nent when the ifa-ch is in its outer position and cooperA ig with the driving pinion to eiiect inward abutment escaping` movement ot the rack against the 'torce o the spring, said rackv initially traveling upon the pinion and subsequently cooperating with the carrier to turn the pinion loosely when the racl; is spring pressed outwardly upon escaping the abutment in again mov ing the racl; toward the abutment.

ti.. The combination with a rotatable carrier; oi a rack bodily movable upon and traveling with the carrier; a driving pinion in mesh with the rack; means for driving` the pinion and in lost motion connection therewith; means ior placing the rack in an outer position and increasing the speed oft the carrier; and an abutment with which a side of the rack is brought into escaping engagement when the racl; is in its outer position and cooperating with the driving pinion to effect inward abutment escaping movement of the rack, said rack initially traveling upon the pinion and subsequently cooperating with the carrier to turn the pinion when the racl is moved outwardly upon escaping the abutment in againfmoving the rack toward the abutment.

7, The combination with a rotatable carrier; oft a rack bodily movable upon and traveling with the carrier; a driving pinion in rn si with the rack; means tor driving the pinion and Vin lost motion connection therewith; a spring for placing the rack in an outer position; and an abutment with which side ot the rack is brought into :ung engagement when the rack is in itsl ti.V The combination `with a rotatable car-f rier; of aracl; bodily movable upon and travelingwith the. carrier; driving pinion in mesh with the ach; means i'or drivingthe pinion and in lost motion connection therewith; means for placing the rack in an outer position and increasing the speed or the carrier; and an abutment with which side oi' the rack is brought into escaping engagement when the rack is in its outer position and cooperating with the driving pinion to effect inward abutment escaping` movement of the rack, said rack and pinion cooperating to turn the carrier to again move the rack toward the abutment.

9. The combination with a rotatable carrier; of a rack bodily movable upon and traveling with the carrier; a driving pinion in mesh with the racli; means for driving the pinion and in lost motion connection therewith; a spring for placing the racli in an abutment engaging position; and an abutment with which the rack is brought into escaping engagement when the rack in its abutment engaging position and co operating with the driving pinion toeiieet abutment escaping movement ot the rack against the `torce of the spring, said rack initially traveling upon the pinion and subsequently cooperating `with the carrier to turn the pinion when the rack is spring pressed toward abutment engaging positionupon escaping the abutment in again moving the rack toward the abutment.

10. The combination with aV rotatable car rier; of a rack bodily movable upon and traveling with the. carrier; a driving pinion in mesh with the rack; means for driving the pinion. and in lost motion.- connection therewith; means or placing the rack in an abutment engaging position and incre fing the speed ot the carrier; and an abutn nt with which the rack is brought into escaping l engagement when 'the rack is in its abutnie-nr1 engaging position and cooperating with the driving pinion to ei'iect abutment escaping movement of the rack7 said'raclc initially traveling upon the pinion and subsequently cooperating with the carrier to turn the pinion when the rack is moved to abutment engagingV position upon escaping the abutment in again moving the rack toward the abutment.

l1. The combination with a rotatable caragainst the force of -the spring, said rack and pinion cooperating to turn the carrier to again move the rack toward the abutment.

12. The combination with a rotatable carrier; of a rack bodily movable upon and traveling with the carrier; a driving pinion in mesh with the dach; means for driving the pinion and in lost. motion connection therewith; means for placing the rack in an abutment engaging position and increasing the speed of the carrier; `and an abutment'ivith which the rack is brought into escaping` engagement when the rack is in its abutment engaging position and cooperating with the driving pinion to effect abutment escaping movement of the rack; said rack and pinion cooperating to turn the carrier to again move the rack to yard the abutment.

13. The combination with a rotatable carrier; ot a plunger carried thereby; a spring for moving the plunger to one position; an abutment positioned to be engaged by a side of the plunger when in this position; mechanism7 supplied in addition to the abutment and in actuating relation to the'plunger, cooperating with the abutment for effecting the movement of the plunger to an alternative position against the force of the spring when the plunger engagesthe abutment and with the plunger and spring for effecting rapid movement of the carrier in a direction to carry the plunger toward the abutment; and means for driving said mechanism and in lost motion connection therewith.

14E. The combination with a rotatable carrier; of a plunger carried thereby; means for moving the plunger to one position; an abutment positioned to be engaged by a side of the plunger when in this position; mechanism for effecting the movementVv of they plunger to an alternative position when the plunger' engages the abutment and for effecting'rapid movement of the Vcarrier in a direction vto carry the plunger toward the. abutment; and means for driving said mechanism and in lost motion connection therewith. y

15. rI-he combination with a rotatable carrier; of a plunger carried thereby; a spring foi-.moving the plunger to one position; an abutment positioned to be engaged by the plunger when in this position; mechanism, supplied in addition to the abutment and in actuating relation to the plunger; cooperatingk with the abutment for effecting the movement of the plunger to an alternative position against the force ofthe spring when lthe plunger engages the abutment and vwith the plunger and kspring for effecting rapid movement of the carrier inra direction to carry the plunger toward the abutment; and means forkdriving said mechanism and in lost motion connection therewith. i

16. The combination with a rotatable Car.-

rier; of aV plunger carried thereby; means for moving the plunger to one position; an abutment'positioned tobe engaged by the plunger when in this position; mechanism7 supplied in addition to the abutment and in actuating relation to the plunger', for effecting the movement of the plunger to an al-A ternative position when the plunger engages the abutment andfor effecting rapid movement of the carrier in a direction to cairy the plunger toward the abutment; and means for driving said mechanism and in lost mon tion connection therewith. l

17. The combination with a rotatable carrier; of a plunger carried thereby; a spring for' moving the plunger to one position; an abutment positioned to be engaged by a side of the plunger when in this position; mechanism, supplied in addition to the abutment and in actuating relation'to the plunger, cooperating with the abutment for effecting the movement of the plunger to an alteinative position against the force of the spring when the plunger engages the abutment; said spring serving to effect rapid movement of the carrier in a 'direction to bring the plunger .toward the abutment; and means for driving said mechanism and in lost motion connection therewith. v

18. The combination with a rotatable carrier; of a plunger carried thereby; a spring for moving the plunger to one position; an abutment positioned to be engaged by the plunger when in this position; mechanism; supplied in addition to the abutment and in actuating relation to the plunger; cooperating with the abutment for effecting the movement of the plunger to an alternative position against the force oi' the spring when the plunger engages the abutment, said spring serving to effect rapid movement of the carrier in a direction to bring the plunger towardv the abutment; and means for driving said mechanism and in lost motion connection therewith.

19. The combination with a rotatable carrier; of a plunger carried thereby; a spring device, when free to. function; to move the plunger to one position; an abutment 4positioned to be engaged by a side of the plunger when in this position; mechanism, supplied in addition to the abutment and in actuating relation to the plunger, for effecting the movement of the plunger to an alternative position against the force ofthe spring when the plunger engagesV the abutment; said spring serving to effect rapid movement of the carrier in a direction to bring the plunger toward the abutment; and means for driving said mechanism and in lost motion connection therewith.V y

20. The combination with a rotatable carrier; of` a plunger carried thereby; a spring device; when free to function, to move the plunger to one position; an abutment positioned to he engaged by the plunger when in this position; mechanism, supplied in addition to the abutment and in actuating relation to the plunger, for effecting the movement of the plunger to an alternative position against the oree of the spring when the plunger' engages the abutment, SaiclL spring serving to effect rapid movement of the Carrier in a direction to bring the plunger toward the abutment; and means 'l'or 10 driving said mechanism and in lost motion Connection therewith.

In Witness whereof7 I hereunto subscribe my name.

JAMES LAROGCA. 

